The cause of floods, heavy rains, which began in the second half of the day. The other 15 high-school students who were with them were rescued by police and military forces.
"Police questioned three staff members from the academy that organised the trip", Micky Rosenfeld said in a statement.
Following the deaths of 10 Israeli teenagers who died on Thursday afternoon in a flash flood near the Dead Sea, US Ambassador to Israel David Friedman took to Twitter to offer his condolences on Friday.
The staffers - a principal and teacher - at Bnei Zion, a Tel Aviv-based pre-military academy, were remanded in custody until Tuesday over their alleged disregard of flood warnings.
Twelve people have died, including two children, after heavy rains sparked flash floods in a number of areas across the West Bank and Israel.
Eventually, authorities announced on Thursday night that the bodies of the ten dead students were recovered and that they were all aged between 17 or 18.More news: Train rams into school van, kills 13 students
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Of the nine teenagers who lost their lives, eight were female and one was male.
A survivor who witnessed a almost 10-foot wave sweep his friends away told local media, "I saw bodies floating in the water".
TheTimes of Israel reported the victims as being Ilan Bar Shalom, Shani Shamir, Agam Levy, Romi Cohen, Tzur Alfi, Ella Or, Gali Balali, Maayan Barhum, Adi Raanan, and Yael Sadan.
Prime Minister Benjamin Netanyahu called it a "disaster" and said he was being updated regularly by those conducting the search.
"Israel today mourns the promising lives that were cut short in the massive tragedy in the Arava. We will keep going until we find them all", she said earlier, when several of the students were being treated as missing. "I ask all to please follow their instructions".